biostudies-literatureKlementyeva SVKlaus Tschira Foundation1994https://www.ebi.ac.uk/biostudies/studies/S-EPMC9965685biostudies-literatureUnknown28(4)We report the synthesis and characterization of two types of new mixed-ligand rare earth complexes: tetracoordinate (NacNac^Mes)Ln(BIAN^dipp) (Ln = Dy (<b>1</b>), Er (<b>2</b>) and Y (<b>3</b>)) and pentacoordinate (NacNac^Mes)Ln(AP^dipp)(THF) (Ln = Dy (<b>4</b>), Er (<b>5</b>) and Y (<b>6</b>)). The first three compounds were prepared by the reaction of [(BIAN^Dipp)LnI] with potassium β-diketiminate. The salt metathesis of β-diketiminato-supported rare earth dichlorides (NacNac^Mes)LnCl₂(THF)₂ with sodium o-amidophenolate results in compounds <b>4</b>-<b>6</b>. The crystal structures of complexes <b>1</b>-<b>6</b> were determined by single-crystal analysis. The combination of bulky monoanionic N-mesityl-substituted β-diketiminates with sterically hindered redox-active ligands led to the very low coordination numbers of rare earths and strong distortion of the chelate ligands.Molecules (Basel, Switzerland)Low-Coordinate Mixed Ligand NacNac Complexes of Rare Earth Metals.PMC9965685project GSO/KT37Abramov PAPoddel'sky AISukhikh TSKlementyeva SVfalseLow-Coordinate Mixed Ligand NacNac Complexes of Rare Earth Metals.We report the synthesis and characterization of two types of new mixed-ligand rare earth complexes: tetracoordinate (NacNac^Mes)Ln(BIAN^dipp) (Ln = Dy (<b>1</b>), Er (<b>2</b>) and Y (<b>3</b>)) and pentacoordinate (NacNac^Mes)Ln(AP^dipp)(THF) (Ln = Dy (<b>4</b>), Er (<b>5</b>) and Y (<b>6</b>)). The first three compounds were prepared by the reaction of [(BIAN^Dipp)LnI] with potassium β-diketiminate. The salt metathesis of β-diketiminato-supported rare earth dichlorides (NacNac^Mes)LnCl₂(THF)₂ with sodium o-amidophenolate results in compounds <b>4</b>-<b>6</b>. The crystal structures of complexes <b>1</b>-<b>6</b> were determined by single-crystal analysis. The combination of bulky monoanionic N-mesityl-substituted β-diketiminates with sterically hindered redox-active ligands led to the very low coordination numbers of rare earths and strong distortion of the chelate ligands.2023-01-01T00:00:00Z2023 Feb2025-04-19T07:37:48.621Z2025-02-18T23:57:49.564ZS-EPMC99656853683898010.3390/molecules28041994